CALL: PLOT_CONTOURS
The matrix to be plotted.
This matrix should be 2-dimensional, and have a length of at
least 2 in both directions. In the descriptions, the first
index of the matrix will be written x, the second y.
The overall size of the matrix is limited to an amount that
depends on the graphics system used (NAG or HIGZ) but is in
both cases very large (around 10000 words at least).
Number of contours to be drawn. If the ROUND option is used,
this number is used as an indication only - the actual number
will usually be larger.
The permissible range depends on the underlying graphics
system, but usually covers [2,50].
A string containing options chosen from the following list.
Most options are only applicable to one graphics system and
are neglected on the others.
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Option Effect
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POLAR Polar coordinate system
CARTESIAN Cartesian coordinate system
ROUND Select nearest round numbers for contour heights
LABEL Labels the contours
COLOUR Produces a colour map, or colours the contours.
TYPE Distinguish the contours by line type
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Vector with the x-coordinates of the matrix.
Only the first and last element are used to set the
scale along the x-axis of the plot.
If omitted, a range of [0, 1] is assumed.
Vector with the y-coordinates of the matrix.
Only the first and last element are used to set the
scale along the x-axis of the plot.
If omitted, a range of [0, 1] is assumed.
A string to be placed along the x-axis.
If omitted, the name of the global variable associated
with x-vector is used, if there is one, otherwise the
string 'x-axis' is taken.
A string to be placed along the y-axis.
If omitted, the name of the global variable associated
with y-vector is used, if there is one, otherwise the
string 'y-axis' is taken.
A string to be placed above the plot.
If omitted, the name of the global variable associated
with matrix is used, if there is one, otherwise the
title is left blank.
Keyword index.
Formatted on 10/11/98.